DATASHEET
IEC Inlet Filters FN 9274
Versatile Medical Class II EMC/EMI Filter
2021
14 Apr 2021
EMC/EMI Products
FN 9274: Versatile Medical Class II EMC/EMI Filter
  • Medical filter suitable for compliance with Protection Class II (ME) according IEC 60601-1
  • Fulfills the requirement for two MOPP (means of patient protection), compliant with IEC/EN 60601-1
  • No leakage current to earth
  • Rated currents up to 15 A
  • Excellent performance/size ratio
  • Front mount, rear mount and snap-in versions (B, MB and S1B type)
  • Plastic enclosure for higher dielectric strength insulation
  • Fast-on terminals or wire leads
  • V-lock compatible

Performance indicators

Technical specifications

Maximum continuous operating voltage

250 VAC, 50/60 Hz

Rated currents

1 to 15 A @ 40°C max.

Operating frequency

DC to 400 Hz

High potential test voltage

P –> N 760 VAC for 2 s
P/N –> Ext. insulation 4 kVAC for 60 s acc. IEC 60601-1

Temperature range (operation and storage)

-40°C to +100°C (40/100/21)

Design corresponding to

up to 15A: UL 60939-3, CSA Std C22.1 No. 8-13
up to 10A: IEC/EN 60939-3, GB/T15287, GB/T15288

Protection category

IP 40 according to IEC 60529 (front side, with inserted plug)

Overvoltage category

II acc. IEC 60664-1

Pollution degree

2 acc. IEC 60664-1

Vibration and shock

3M4 acc. IEC 60721-3-3

MTBF @ Rated amb. Temp./Voltage (Mil-HB-217F)

> 1,000,000 hours

Flammability corresponding to

Plastic Material: UL 94 V-0
Laces for -07 version: UL 94 VW-1

Approvals & Compliances

The FN9274 IEC inlet filter is suitable for compliance with Class II ME equipment. It incorporates an EMC filter into a C18 IEC inlet that offers excellent filter attenuation in a compact housing.

The filter is available with two connection variants on the load side. The cable version is touch-safe by default. The pins of the fast-on-version are recessed in the plastic housing. In combination with insulated crimp connectors Class II compliance can be achieved for Fast-on version.

The requirements for Two MOPP in IEC 60601-1:2005 + A1 regarding Leakage Currents, Insulation and Air Clearance and Creepage Distances and Ball Pressure test are fulfilled.

Features and benefits

  • Suitable for class II Medical Equipment (ME)
  • Fulfills the requirements for Two MOPP in IEC 60601-1 - Medical electrical equipment
  • Fulfills the requirements in IEC/EN 62368-1 - Audio/video, information and communication technology equipment
  • Fulfills the requirements in IEC/EN 60950-1 - Information technology equipment
  • Fulfills the requirements in IEC/EN 60335-1 - Household and similar electrical appliances
  • Fulfills the requirements for Reinforced Insulation in IEC 61010-1 - Safety requirements
  • All versions certified according UL/IEC 60939-3, C22.2 No. 8. CQC/CCC GB/T15287 and GB/T15288

Typical applications

  • General medical devices (MDD)
  • In-vitro diagnostic medical devices (IVDD)
  • Test and measurement equipment
  • Portable electrical and electronic equipment
  • Single-phase power supplies, switch-mode power supplies (SMPS)
  • Audio / video / communication equipment (IEC/UL 62368-1)

Electrical schematic

Filter selection table - classic

Filter Buy Rated current
Leakage current Inductance Capacitance Resistor Input Output Weight
  @ 40°C   L1 Cx R connections connections  
         *  
  [A] [mA] [mH] [µF] [MΩ]   [g]
FN9274XXB-1-ZZ 1 0.0 41.1 0.22 1 C18 -05 -07 <40
FN9274XXB-2-ZZ 2 0.0 20.1 0.22 1 C18 -05 -07 <40
FN9274XXB-4-ZZ 4 0.0 7.2 0.22 1 C18 -05 -07 <40
FN9274XXB-6-ZZ 6 0.0 3.2 0.22 1 C18 -05 -07 <40
FN9274XXB-10-ZZ 10 0.0 1.3 0.22 1 C18 -05 -07 <40
FN9274XXB-15-ZZ 15 0.0 0.4 0.22 1 C18 -05 -07 <40

Test conditions: Temperature: 25°C±2°C; measuring frequency for inductance: 1 kHz, 50 mV
Tolerances: Inductance: +50%, -30%; capacitance: ±20%; resistance: ±10%. For mechanical tolerances, please refer to the mechanical data section
* Standard length is 160 mm

Product selector


For example FN9274MB-15-05:
- FN9274 IEC inlet with
- rear mount flanges (M),
- 15A rated current (15) and
- fast-on terminals (05).

Design-in recommendation:
- EMC and functional test with FN9274B-XX-05 (safety stock all currents - front mount, fast-on types)
- Mechanical integration with FN9274XXB-15-ZZ (safety stock for all variants - 15A-types)

Typical filter attenuation

Per CISPR 17   /   symmetrical 50 Ω/50 Ω - Differential Mode (DM)   /   asymmetrical 50 Ω/50 Ω - Common Mode (CM)

1 A

2 A

4 A

6 A

10 A

15 A

Mechanical data - front mount

FN9274B-XX-05

FN9274B-XX-07

For dimensions [mm] without tolerances: ISO 2768-m / EN22768-m applies

Mechanical data - rear mount

FN9274MB-XX-05

FN9274MB-XX-07

For dimensions [mm] without tolerances: ISO 2768-m / EN22768-m applies

Mechanical data - snap-in

FN9274S1B-XX-05

FN9274S1B-XX-07

For dimensions [mm] without tolerances: ISO 2768-m / EN22768-m applies

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© 2021 Schaffner Group

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